Biology Notes Chapter 2 Outline

The Chemical Context of Life - biology is a multidisciplinary scientific discipline - living beingnesss argon subject basic laws of physics and chemistry - wiz example is the uptake of formic sharp by ants to maintain devils gardens, stands of Duroia manoeuvers - ants keep wholly other plants and trees and shrubs out of the scene of action so that the Duroia trees can bristle there by sticking other plants with formic acid bite that makes them shrivel up and die - in return, trees provide treasure for the ants - Fig. 2.1 - Duroia trees in virago forest - Fig. 2.2 - D. Gordon and M. Green did experiment: took a tree, place it inside, sprayed insect powder around the tree so ants wouldnt bother it, the unsprayed tree grew, the sprayed one died - organisms are composed of librate - matter is anything that takes up piazza and has mass - matter is made up of elements - an element is a affection that cannot be broken down into other substances by ordinary bicyc le means - a mix is a substance consisting of 2 or more elements in a fixed ratio - a compound has characteristics different from those of its elements - emerging properties - when a mixture has properties that do not belong to its components (i.e. sodium chloride) - Fig. 2.

3 - sodium chloride (salt) - about 25 of the 92 innate(p) elements are essential to life - carbon, hydrogen, oxygen, and nitrogen make up 96% of living matter - most of the remaining 4% consists of calcium, phosphorus, potassium, and sulfur - character elements are those required by an organism in exquisite quantities - Table 2.1 - necessary elements and tra ce elements in the human body - Fig. 2.4 - ! ace deficiency that has lead to a goitre (inflamed and swollen thyroidal gland) - each element consists of singular atoms - an atom is the smallest unit of matter that still retains the properties of an element - atoms are ecomposed of subatomic particles (protons - positive charge, neutrons - no charge, and electrons - minus charge) - neutrons and protons are in the...If you want to get a all-encompassing essay, order it on our website: BestEssayCheap.com

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